CLAS Physics Database

Measurement E213M505

Experiment: E1-6, 2025
Year: 2001

Measurement comment:

The angle ψ is the angle between the plane defined by the three-momenta of the hadron (in parentheses) and the target proton, and the plane defined by the three-momenta of the other two final-state hadrons

Experiment comment:

Experiment year: 2001—2002
Spokespersons: R.W. Gothe, A. Trivedi
Reaction: ep → π+πp
Polarization: none
Quantity: dσ/dψ(π)
Q2: 2.4 — 3.0 GeV2
W: 1.65 — 1.675 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π), [deg] dσ/dψ(π), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.5743 0.0438 0.1267 0.1916
54.0 0.6328 0.0373 0.1059 0.1483
90.0 0.7449 0.0388 0.1126 0.1191
126.0 0.7519 0.0401 0.1112 0.1182
162.0 0.8118 0.0346 0.1142 0.1193
198.0 0.8018 0.0349 0.113 0.1183
234.0 0.6743 0.0376 0.1016 0.1083
270.0 0.7348 0.0376 0.1112 0.1174
306.0 0.6144 0.0392 0.1039 0.147
342.0 0.5429 0.034 0.1213 0.1807